Radial car-truck.



PATENTED MAY 12, 1903...

R. L. RLLRRY. A RADIAL CAR TRUCK.

APPLIUAION FILED JUNE 7, 1902.

. a SHEETS-SHEET 1.

No MODEL.

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PATBNTED MAY 12., 1-903.

R.. L. BLLERY.

RADIAL CAR- TRUGK.

APPLIOATION FILED JUNE 7. 1902.

3 SHEETS-SHEET 3.

.N0 MODEL.

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UNITED STATES Patented May-12, 1903.

PATENT OFFICE.

ROBERT L. ELLERY, OF PORTSMOUTH, NEW HAMPSHIRE, ASSIGNOR To SHERRURN M.MERRILL, TRUSTEE, OE BOSTON, MASSACHUSETTS.

RADIAL ,CAR-TRUCKQ' SPECIFICATION-forming' part of Letters Patent No.727,919, dated May 12, 1903.

Application filed June 7, 1902. Serial No. 110,605. (No model.)V

i To all whom it may concern:

Beit known that I, ROBERT L. ELLERY, a

citizen of the United States, residing at Ports-V A electric railways inwhich the motor is supported partly upon the axle andpartly upon thetruck-frame. y

The object of the invention is to provide a car-truck which is soconstructed that the axles will readily adjust themselves to a ra dialposition as thel truck and the car-,body supported thereon are passingaround a curve, thus greatly diminishing the amount of friction betweenthe car-wheels and the track.

The invention consist-s in a carltrnckfof a frame, ways provided inYsaid frame, and an axle journal-box arranged to move horizontally' uponSaid frame in said ways.

The invention again consists in a car-truck, of the combination of aframe, a slide arranged to move vertically in said frame, and an axlejournal-box arranged to move horizontally in said slide. v

The invention still further consists in a car# truck, of a frame, aslide arranged to move vertically in said frame, an axle journal-boxarranged to move horizontally in said slide, a lever pivoted to saidframe, and a link conf necting said lever to said journal-box andoperating to move said box horizontally in said slide. 1

The invention further consists in the instru mentalities hereinbeforeset forth in combination with a car-body pivotally supported upon saidtruck-frame and pivotally connected to said lever.

The invention finally consists in the cornbination and arrangement ofparts set forth in the following speeioation and particularly pointedout in the claims thereof.

Referring to the drawings, Figure 1 is a plan view of two of my improvedoar-trucks with a portion of a body of a car supported thereon, the samebeing shown in the position assumed thereby when passing along astraight track. Fig. 2 is a plan view of said trucks as thesameappear inrounding a curve, the car-body being shown in dotted lines. Fig. 3

' isv an enlarged plan view of my improved radial car-truck, a portionof the body of the car being illustrated in dotted lines, the truckbeing shown in the position assumed thereby when passing along astraight track, the kingbolt and the pin by which one of the levers ispivotally connected to the ear-body being shown in section. Fig. 4 isaplan view of the truck, similar to Fig. 3, except that the truck Fig. 5is a side eletaken through Aone ofthe journal-boxes on line 5 5Of Fig.3,' a portion of the car axle and wheel beingshown in elevation inposition in their relation thereto.

`In the drawings, 10 is the truck as a whole, consisting of a main frame11, provided with two parallel cross-braces 9 and 12, rigidly fastenedto the frame 11 and having a bolster 13 located therebetween, saidbolster resting upon springs 14 14, su pported upon the frame 11. Thecar-body 15 is pivoted, by means of a king-bolt 16, to the center plate17, fast to the bolster 13.

The axle 18 is provided with a pair of wheels 19 19 and is arranged torotate at each end in a journal-box 20, said journal-box being arrangedto move in horizontal ways 21 21, formed upon a slide 22. The slide 22is arranged to move vertically upon ways 23, provided upon the frame 11.Above the slide 22 springs 24 are interposed between the frame 11 andslide 22, so that the frame 11 is springsupported upon said slide 22through the journal-boxes 20 upon the axle 18. The axle 25 has fastthereto Wheels 26 26.aud is ar- I ranged to rotate at each end in ajournal-box IOO posed between the frame 1l and slide 29, so that theframe 11 is spring-supported upon said slide 29 through thejournal-boxes 27 upon the axle'25.

To the cross-brace 12 is fastened a bracket 31, and to this bracket alever 32 is pivoted by means of a pin 33. Each end of the lever 32 isconnected by a link 3% to one ofthe journal-boxes 20. To the cross-brace9 is fastened a bracket 35, to which is pivoted a lever 36 by means of apin 37, said lever 36 being connected at each end to one of thejournalboxes 27 by a link 3S. The lever 36 has an arm 39 integraltherewith and connected by a link 40 to the lever 32. The car-body ispivotally connected to the lever 32 by means of a pin 41.

The general operation of my improved truck is as follows: When in itsnormal position, as shown in Figs. 1 and 3, the axles 25 and 18 of eachof the trucks are parallel to each other and the longitudinal medianline of the car coincides with the longitudinal median line of the truck10,*said longitudinal median line passing through the pivotal king-bolt16 and also through the pivotal pin 33 and through the pin 41, as shownin Figs. 1 and 3; but as the trucks, together with the car-body, passaround a curve the median line of the carbody stands at varying angleswith the median line of the truck, as seen in Figs. 2 and 4, the effectbeing the same as to suppose the truck to remain stationary and rotatethe car-body upon the king-bolt 16. This relative rotation of thecar-body to the truck-frame moves the pin 41 to one side or the otherofthe median line of the truck, or, in other words, rotates said pinaround the king-bolt 16 asa center, thus rotating the lever 32 upon itscenter 33 and through the links 34 moving the axle 1S into a positionradial with the curve around which the truck is passing. Itis evidentthat as the axle 18 is moved into radial position, as hereinbeforedescribed, the axle 25 will also be moved into a radial position withrelation to the curve around which the truck is passing, being movedinto said position by said lever 32, the link 40, the lever 36, and thelinks 38 38, as shown in Figs. 2 and 4. Thus it will be seen that theangle of the car-body to the truck is changed in passing around a curveand the relative position of the axles 25 and 18 is changed from aposition parallel to each other to a position in which they convergetoward each other, the angles which said axles assume placing them in aradial position in relation to the curve around which the truck ispassing. Assuming the truck to be moving in the direction of the arrow,Figs. 1 and 3, the leading truck will be rotated upon its pivotalking-bolt 16 by reason of the flanges upon the leading pair of Wheels 19being guided by the curve ot' the track, and as said truck is swung uponits pivot the axles will be thrown into a radial position with relationto the curve by means of the links and levers connecting the car-body tothe journal-boxes,

and thus to the axles, as hereinbefore de-` scribed. As the leadingtruck passes around a curve the car-body is carried therewith and isrotated upon the rear truck, thus bringing the median line of saidcar-body at an angle with the median line of said rear truck, causingthe axles upon the rear truck to assume a position radial to the curvearound which said truck is passing. By reason of the median line of thecar-body assuming an angle 'to the median line of the truck and throughthe levers and link's upon the rear truck the axles are caused to assumea radial position with relation to the curve around which the truck ispassing.

It will be noted that the front and rear trucks are exact duplicates intheir construction, but are reversed in position with relation to eachother.

By the particular manner -in which I construct my improved truck andattach the carbody thereto it will be seen that there is an undisturbedspace provided between each of the axles and the end of the truckwherein a motor may be conveniently placed, a portion of theweight ofthe motor resting upon the axle 18 or 25 and the remainder of the weightupon the truck-frame.

I-laving thus described my invention, what I claim ,and desire byLetters Patent to secure, 1s-

1. In a car-truck, a frame, slides arranged to move vertically in saidframe, an axle journal-box in each of said slides arranged to movehorizontally thereon, an axle j ournaled to rotate in said boxes, alever pivoted to said frame,links connecting said lever to saidjournal-boxes, a bolster extending transversely of said frame andspring-supported thereon; in combination with a car-body pivoted to saidbolster and pivotally connected to said lever, whereby, when saidcar-body rotates upon its pivot with relation to said frame in passingaround a curve, said lever is rocked and said axle moved to assume aposition radial to said curve.

2. In a car-truck, a frame, slides arranged to move vertically in saidframe, an axle j our nal-box in each of said slides arranged to movehorizontally thereon, a pair of axles journaled to rotate in said boxes,a pair of levers pivoted to said frame, links' connecting each of saidlevers to one of said axles by means of said journal-boxes, and a linkconnecting said levers one to the other.

3. In a car-truck, a frame, slides arranged to move vertically in saidframe, an axle journal-box in each of said slides arranged to movehorizontally thereon, a pair of axles journaled to rotate in said boxes,a bolster springsupported upon said frame between said axles, a pair oflevers pivoted to said frame, links connecting each of said levers toone of said axles by means of said journal-boxes, and a link connectingsaid levers one to the othergin combination with a carbody pivotallysupported upon said bolster IOO and pivotally connected to one of saidlevers, whereby, when said ear-body rotates upon itspivot with relationto' said frame in passing around a curve, said axles are moved to assumepositions radial to said curve.` v

4. In a ear-truck., a frame, horizontal Ways provided in said frame, apair of axlejournal-boxes arranged to move horizontally between saidways upon said frame, an axle j ournaled to rotate in said boxes, ahorizontal lever pivoted to said frame, links connecting said lever tosaid Journal-boxes, a bolster eX-.i

tending transversely of said frame and springsupported thereon; incombination with a ally connected to said lever, whereby, when saidear-body rotates upon its pivot with re-v' lation to said frameinpassing around a curve,

. said lever is rocked and said axle moved to assume a position radialto said curve.

In testimony whereof I have hereunto set my hand in presence of twosubscribing witnesses.

ROBERT L. ELLERY.

Witnesses: Y

CHARLES S. GOODING, ANNIE J.'DAILEY.

